A control system for an electric lifting table

Abstract

The present invention discloses an electric lifting table control system, which belongs to the field of equipment control technology, including a table top, lifting table legs, supporting table legs and a control panel, wherein the table top and the supporting table legs are connected through the lifting table legs, the supporting table legs are used to support the entire electric lifting table to keep it stable, the lifting table legs control the adjustment of the height of the table top, the control panel is used for the user to actively adjust the height of the table top and input data, and also includes a height binding module, a sitting posture monitoring module, a standing posture monitoring module, and a height adjustment module. The present invention can monitor the duration of the user's sitting posture state, and when a preset threshold is reached, the user is reminded to stand up and adaptively adjust the height of the table top, so that the user can appropriately switch the working posture, and switch between standing and sitting postures in an orderly manner, which is beneficial to the user's physical health and reduces the probability of the user's illness caused by sitting for a long time, and the threshold of the sitting posture duration can be intelligently set according to the user's physical condition.

Description

Technical Field

[0001] The invention relates to the technical field of equipment control, and in particular to a control system for an electric lifting table. Background Art

[0002] The electric lift table is an intelligent office furniture that combines modern technology with traditional furniture design to provide office workers with a more comfortable and healthy office environment. Driven by electricity, the electric lift table can easily achieve automatic adjustment of the desktop height to meet the personalized needs of different users. The electric lift table control system is the core part of the electric lift table. It uses electric drive motors to achieve automatic adjustment and lifting of the table height through mechanical devices and electronic components. The control system of the electric lift table has multiple functions, including height adjustment, anti-collision sensing, sedentary reminder, remote control, etc.

[0003] The electric lift table control system in the prior art often requires the user to adjust the height by inputting parameters or corresponding instructions, which is difficult to adjust automatically and cannot distinguish between the user's sitting and standing status. As a result, it is difficult for the existing control system to actively adjust the desktop height of the electric lift table according to the user's sitting and standing time and provide health reminders. The degree of intelligence is not high, and the height adjustment speed is fixed and slow, which affects the user's actual usage experience and needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to propose an electric lift table control system in order to solve the problem that the existing control system is difficult to actively adjust the table top height of the electric lift table according to the user's sitting time and provide health reminders, and the intelligence level is not high.

[0005] The purpose of the present invention can be achieved by the following technical solutions: an electric lifting table control system, including a table top, lifting table legs, supporting table legs and a control panel, the table top and the supporting table legs are connected by the lifting table legs, and also includes a height binding module, a sitting posture monitoring module, a standing posture monitoring module, and a height adjustment module;

[0006] The height binding module includes a high-definition camera for obtaining a high-definition image of the use side of the table, and binds a standing posture data set and a sitting posture data set for each user. The data set contains the table height under the user's corresponding posture and the corresponding face data in the high-definition image;

[0007] A sitting posture monitoring module includes a laser monitoring unit and a sitting time monitoring unit. The laser monitoring unit is used to monitor whether there is an object blocking the table. Two user status signals are preset, namely, a sitting posture status signal and another status signal. The sitting posture status signal and the other status signal are generated according to the blocking signal. The sitting time monitoring unit records the duration of the sitting posture status signal, obtains the user's health information to calculate the sitting posture restriction time, compares the duration of the sitting posture status signal with the sitting posture restriction time, generates a sitting posture too long signal, and raises the table board to switch to a standing posture status signal;

[0008] The standing posture monitoring module includes a radar monitoring unit and a standing time monitoring unit. The radar monitoring unit is used to generate a standing posture state signal. The standing time monitoring unit is used to record the standing posture duration and calculate the standing time threshold. When the standing posture duration is greater than or equal to the standing time threshold, a standing posture too long signal is generated to control the table board to descend and switch to a standing posture state signal.

[0009] The height adjustment module obtains a sitting status signal or a standing status signal, extracts the face data in the current high-definition image according to different signals, and compares them with the face data in each standing data set or sitting data set, and adjusts the table height according to the comparison results and the obtained status signal.

[0010] As a preferred embodiment of the present invention, the laser monitoring unit includes three groups of laser transceiver components located under the desktop, the laser transceiver components include a laser transmitter and a laser receiver arranged opposite to each other, and the three groups of laser transceiver components are all located on the same vertical plane, two groups of laser transceiver components are arranged crosswise, and the other group of laser transceiver components is arranged horizontally;

[0011] When the three groups of laser transceiver components all generate occlusion signals, the user state is judged as sitting and a sitting state signal is generated. When the three groups of laser transceiver components all generate unobstructed signals, other state signals are generated. When the generated user state signal is different from the current user state signal, the user state signal is switched.

[0012] As a preferred embodiment of the present invention, the three laser emitters are respectively a first laser emitter, a second laser emitter and a third laser emitter, and the corresponding three laser receivers are respectively a first laser receiver, a second laser receiver and a third laser receiver, the first laser emitter and the second laser emitter are arranged on both sides below the table top, the first laser receiver and the second laser receiver are arranged on the table legs, the first laser emitter is located below the second laser receiver, and the second laser emitter is located below the first laser receiver, the lasers emitted by the first laser emitter and the second laser emitter are in an X shape, and the third laser emitter and the third laser receiver are respectively arranged on both sides of the table legs and on the same horizontal line.

[0013] As a preferred embodiment of the present invention, the sitting time monitoring unit obtains a sitting status signal, records the duration of the sitting status signal as the sitting time, and presets a sitting time threshold. The sitting time threshold is directly input by the user or indirectly calculated based on the user's health information. When the sitting time is greater than or equal to the sitting time threshold, a sitting too long signal is generated, and the sitting status signal is cleared at the same time, the buzzer is controlled to sound an alarm, and the table top is controlled to rise after a certain period of time to generate a standing status signal.

[0014] As a preferred embodiment of the present invention, the sitting time threshold acquisition process is specifically as follows:

[0015] When the user directly inputs a time value, the time value is used as the sitting time threshold;

[0016] When the user does not enter a time value, obtain the health information data entered by the user. The health information data includes age, lumbar status, cervical status and BMI index. Get the age value , BMI index value , Lumbar spine status value and cervical spine status , substitute into the formula Calculate the sitting time threshold ,in All are preset factors;

[0017] When the user does not input a time value and does not input health information data, the sitting time threshold is adjusted to a preset value.

[0018] As a preferred embodiment of the present invention, the radar monitoring unit includes a radar rangefinder arranged on the usage side of the table top, and the obstruction distance value is obtained by the radar rangefinder. When the laser monitoring unit generates other status signals, the obstruction distance value is compared with the preset obstruction threshold. When the obstruction distance value is less than the obstruction threshold, it is marked as a suspected standing state, and the duration of the suspected standing state is recorded and compared with the preset duration judgment threshold. When it is greater than or equal to the duration judgment threshold, a standing state signal is generated until the obstruction distance value is greater than or equal to the obstruction threshold or a sitting state signal is generated.

[0019] As a preferred embodiment of the present invention, the standing monitoring unit obtains a standing status signal, records the duration of the standing status signal as the standing duration, obtains the sitting threshold and multiplies it by a preset proportional coefficient to obtain the standing threshold; when the standing duration is greater than or equal to the standing threshold, a standing too long signal is generated, the standing status signal is cleared at the same time, the buzzer is controlled to sound an alarm, and the table top is controlled to drop after a certain period of time to generate a standing status signal.

[0020] As a preferred embodiment of the present invention, the height adjustment module adjusts the height of the table top as follows:

[0021] When a sitting posture state signal is obtained, a high-definition image of the user side at the current height is collected and the facial data in the high-definition image is extracted and recorded as user data. The user data is compared with the facial data in each sitting posture data set. When there is matching facial data in a certain sitting posture data set, the height of the table board is adjusted to the corresponding table board height value. Otherwise, the height of the table board is adjusted to the preset sitting posture height value.

[0022] When the standing status signal is obtained, a high-definition image of the user side at the current height is collected and the facial data in the high-definition image is extracted and recorded as user data. The user data is compared with the facial data in each standing data set. When there is matching facial data in a standing data set, the table height is adjusted to the corresponding table height value. Otherwise, the table height is adjusted to the preset standing height value.

[0023] As a preferred embodiment of the present invention, a dynamic analysis unit is further included. When the user status signal generated by the laser monitoring unit switches from the sitting state signal to other state signals, the dynamic analysis unit further analyzes and determines the user status signal. The specific analysis and determination process is as follows:

[0024] S1: Within the preset time range, continuously obtain the occlusion distance value and draw a curve of the occlusion distance value changing over time, extract the maximum occlusion distance value and record it as the farthest distance value , extract the end occlusion distance value of the time variation curve and record it as the end value , the terminal value The farthest threshold from the preset Make comparisons;

[0025] S2: When When the leaving state signal is generated, When , go to step S3;

[0026] S3: Assume that the end time value of the change curve is , preset an intercept duration T, calculate the time range ( ) and recorded as the judgment distance value , get the time range ( ) The maximum and minimum values ​​of the occlusion distance are recorded as and , respectively calculate and Distance value The difference is taken and the absolute value is taken, and the obtained value is compared with the preset fluctuation threshold. When any one of the two values ​​is greater than the fluctuation threshold, step S1 is performed; when both values ​​are less than or equal to the fluctuation threshold, step S4 is performed;

[0027] S4: Calculate the maximum distance value Distance value The difference is recorded as the near distance judgment value , with a preset close distance threshold ,Will and For comparison, Less than When the sitting state signal is generated, Greater than or equal to When , a stance state signal is generated.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention can effectively judge the user's sitting state through the laser monitoring unit, thereby monitoring the duration of the user's sitting state. When the preset threshold is reached, the user is reminded to stand up and adaptively adjust the height of the table board, so that the user can switch the working posture appropriately and switch between standing and sitting in an orderly manner, which is beneficial to the user's physical health and reduces the probability of the user's illness caused by sitting for a long time. The sitting time threshold, that is, the maximum sitting time, is obtained through different methods, so that the size of the sitting time threshold can be adjusted according to the user's needs or comprehensive data. The user can flexibly choose the timing of switching between the sitting and standing states during use, which is more conducive to enriching the user's choices and improving the user experience.

[0030] 2. The present invention can more accurately judge the user's posture through further analysis and processing by the dynamic analysis unit, thereby making up for the sitting state that cannot be monitored by the laser monitoring unit, and can further classify and determine the user's other state signals, making the judgment range of user behavior wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0032] Figure 1 It is a principle block diagram of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the electric lifting table in the present invention;

[0034] Figure 3 It is a front view of the electric lifting table in the present invention, and the dotted line is a schematic line of the laser path.

[0035] In the picture: 1. Table top; 2. Liftable table legs; 3. Supporting table legs; 4. Laser transmitter; 5. Laser receiver; 6. Radar rangefinder. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 As shown, an electric lift table control system includes a table top 1, lift table legs 2, support table legs 3 and a control panel (not shown in the figure). The table top 1 and the support table legs 3 are connected through the lift table legs 2. The support table legs 3 are used to support the entire electric lift table to keep it stable. The lift table legs 2 control the adjustment of the height of the table top 1. The control panel is used for the user to actively adjust the height of the table top 1 and input data. It also includes a height binding module, a sitting posture monitoring module, a standing posture monitoring module, and a height adjustment module.

[0038] The height binding module includes a high-definition camera set on the table top 1. The lens of the high-definition camera faces diagonally upward to obtain a high-definition image of the table top 1 in use, and record high-definition images of different users in sitting and standing postures. Each high-definition image is bound to the height of the table top 1 at that time, so that each user has a corresponding standing data set and a sitting data set. The data set contains the height of the table top 1 in the corresponding posture of the user and the facial data in the corresponding high-definition image.

[0039] The sitting posture monitoring module includes a laser monitoring unit and a sitting time monitoring unit. The laser monitoring unit is used to monitor whether there is any object blocking the table, and generate a sitting posture status signal and other status signals based on the blocking signal. The sitting time monitoring unit records the duration of the sitting posture status signal, obtains the user's health information to calculate the sitting posture restriction time, compares the duration of the sitting posture status signal with the sitting posture restriction time, and generates a sitting too long signal.

[0040] The laser monitoring unit includes three groups of laser transceiver components located below the desktop. The laser transceiver components include a laser transmitter 4 and a laser receiver 5 that are arranged opposite to each other. When the laser receiver 5 cannot receive the laser, it will generate an occlusion signal. When the laser receiver 5 receives the laser, it will generate an unobstructed signal. The three groups of laser transceiver components are all located on the same vertical plane, two of which are cross-arranged, and the other group of laser transceiver components is arranged horizontally. There are two user status signals preset, namely, a sitting status signal and an other status signal. When the three groups of laser transceiver components all generate occlusion signals, the user status is determined to be a sitting status and a sitting status signal is generated. When the three groups of laser transceiver components all generate unobstructed signals, other status signals are generated. Only when the generated user status signal is different from the current user status signal, the user status signal is switched (for example, when the user status signal is a sitting status signal, only when the three groups of laser transceiver components all generate unobstructed signals, the user status signal will be switched to other status signals, otherwise the sitting status signal is maintained), thereby avoiding the status judgment error caused by the user's legs being spread apart in the sitting state, and improving the accuracy of the sitting status judgment.

[0041] It should be noted that the user's sitting posture can be effectively monitored by two sets of cross-arranged laser transceiver components and one set of horizontally arranged laser transceiver components. When the user sits in front of the electric lift table and puts his legs under the table top 1, the light path of the three sets of laser transceiver components will be blocked, thereby generating a sitting posture status signal, and the sitting posture status is only generated when the three sets of laser transceiver components all generate blocking signals, so that when other objects block part of the light path, the sitting posture status signal will not be generated, thereby improving the accuracy of sitting posture judgment.

[0042] Specifically, Figure 2 , Figure 3 As shown, the three laser emitters 4 are respectively recorded as the first laser emitter, the second laser emitter and the third laser emitter, and the corresponding three laser receivers are respectively the first laser receiver, the second laser receiver and the third laser receiver, the first laser emitter and the second laser emitter are arranged on both sides below the table top 1, the first laser receiver and the second laser receiver are arranged on the supporting table leg 3, the first laser emitter is located below the second laser receiver, and the second laser emitter is located below the first laser receiver, the lasers emitted by the first laser emitter and the second laser emitter are in an X shape, and the third laser emitter and the third laser receiver are respectively arranged on both sides of the supporting table leg 3 and are on the same horizontal line.

[0043] The sitting time monitoring unit obtains a sitting status signal, and starts recording the duration of the sitting status signal from the time the sitting status signal is obtained, and records it as the sitting time. A sitting time threshold is preset, and the sitting time threshold is directly input by the user or indirectly calculated based on the user's health information. When the sitting time is greater than or equal to the sitting time threshold, a sitting too long signal is generated, and the sitting status signal is cleared at the same time, and the buzzer is controlled to sound an alarm. After a certain interval (given the user's reaction time, to avoid sudden rise affecting the user's ongoing actions and to improve the user experience), the table top 1 is controlled to rise, and a standing status signal is generated.

[0044] By monitoring the duration of the user's sitting state, when the preset threshold is reached, the user is reminded to stand up and the height of the table top 1 is adaptively adjusted, so that the user can switch working postures appropriately and switch between standing and sitting positions in an orderly manner, which is beneficial to the user's physical health and reduces the probability of the user suffering from illness due to long-term sitting.

[0045] The specific process of obtaining the sitting time threshold is as follows:

[0046] When the user directly inputs a time value, the time value is used as the sitting time threshold;

[0047] When the user does not enter a time value, the health information data entered by the user is obtained, the health information data including age, lumbar status, cervical status and BMI index (BMI is body mass index, calculated as: BMI=weight ÷ height²), where age and BMI index are specific values, and lumbar status and cervical status correspond to a variety of preset status options, each status option corresponds to a status value (for example, in a specific embodiment, the lumbar status is preset with four options of "normal", "bulging", "protrusion" and "dislocation", corresponding to four status values ​​1, 2, 3, and 4, respectively, and the cervical status is preset with "reverse arch", "hyperplasia", "protrusion" and "degeneration", corresponding to four status values ​​1, 2, 3, and 4, respectively), and the age value is obtained , BMI index value , Lumbar spine status value and cervical spine status , substitute into the formula Calculate the sitting time threshold ,in All are preset weight factors, They represent the age at which the body is fully developed (usually 20) and the normal BMI value (usually 21). Indicates the preset maximum value of the sitting time parameter, which is set by the staff during the specific implementation process;

[0048] When the user does not input a time value and does not input health information data, the sitting time threshold is adjusted to a preset value.

[0049] The sitting time threshold is obtained by different methods, so that the size of the sitting time threshold can be adjusted according to user needs or comprehensive data. Users can flexibly choose the timing of switching between sitting and standing states during use, which is more conducive to enriching user choices and improving user experience.

[0050] The standing posture monitoring module includes a radar monitoring unit and a standing time monitoring unit.

[0051] The radar monitoring unit includes a radar rangefinder 6 arranged on the use side of the table top 1. The object blocking distance on the use side of the table top 1 is obtained through the radar rangefinder 6 and recorded as the blocking distance value. When the laser monitoring unit generates other status signals, the blocking distance value is obtained and compared with the preset blocking threshold. When the blocking distance value is less than the blocking threshold, it is marked as a suspected standing state, and the duration of the suspected standing state is recorded and compared with the preset duration judgment threshold. When the duration of the suspected standing state is greater than or equal to the duration judgment threshold, a standing state signal is generated until the blocking distance value is greater than or equal to the blocking threshold or a sitting state signal is generated.

[0052] It should be noted that the occlusion threshold is the distance between the human body and the edge of the table 1 in a preset standing state. When the occlusion distance value is less than the occlusion threshold, it can be preliminarily determined that someone is at the edge of the table 1. By recording the duration of the suspected standing state and comparing it with the preset duration judgment threshold, the misjudgment caused by someone passing by the edge of the table 1 can be ruled out, thereby improving the accuracy of the sitting state signal.

[0053] The standing monitoring unit obtains the standing status signal, and records the duration of the standing status signal from the time the standing status signal is obtained as the standing duration, obtains the sitting threshold and multiplies it by the preset proportional coefficient to obtain the standing threshold. When the standing duration is greater than or equal to the standing threshold, a standing too long signal is generated, and the standing status signal is cleared at the same time, the buzzer is controlled to sound an alarm, and after a certain interval, the table top 1 is controlled to descend and a standing status signal is generated.

[0054] The height adjustment module obtains a sitting state signal or a standing state signal;

[0055] When a sitting state signal is obtained, a high-definition image of the user side at the current height is collected and face data in the high-definition image is extracted and recorded as user data, and the user data is compared with the face data in each sitting data set. When the face data in a certain sitting data set matches the user data, the height of the table board 1 is adjusted to the height value of the table board 1 in the corresponding sitting data set, otherwise, the height of the table board 1 is adjusted to a preset sitting height value (a general desktop height value, in a specific embodiment, its value is 80CM);

[0056] When the standing status signal is obtained, a high-definition image of the user side at the current height is collected and the facial data in the high-definition image is extracted and recorded as user data. The user data is compared with the facial data in each standing data set. When the facial data in a standing data set matches the user data, the height of the table top 1 is adjusted to the table top 1 height value in the corresponding standing data set. Otherwise, the height of the table top 1 is adjusted to the preset standing height value (a universal desktop height value, which is 120CM in a specific embodiment).

[0057] It should be noted that by capturing high-definition images with a high-definition camera and using them for comparison, the user's identity can be determined based on facial data comparison technology, thereby extracting the corresponding user's usage data, so that the user does not need to manually adjust the memory data of the lifting table, thereby improving the convenience of different users using the same electric lifting table. The height of the table top 1 can also be adaptively adjusted according to the user's identity and working posture, which is more intelligent.

[0058] Embodiment 2: Based on an electric lift table control system in Embodiment 1, when the control system monitors the user's sitting posture through a laser monitoring unit during actual use, it can only monitor the situation where the user puts his legs under the table top 1 in the sitting state. When the user steps back to a place far away from the electric lift table, the laser monitoring unit cannot detect the user's sitting posture, thereby erroneously generating other status signals, resulting in misjudgment of the user's posture.

[0059] In view of the above problems, this embodiment proposes further improvements. Compared with the first embodiment, the difference is that it also includes a dynamic analysis unit.

[0060] The dynamic analysis unit further analyzes and determines the user status signal when the user status signal generated by the laser monitoring unit switches from the sitting status signal to other status signals. The specific analysis and determination process is as follows:

[0061] S1: Within the preset time range, continuously obtain the occlusion distance value and draw a curve of the occlusion distance value changing over time, extract the maximum occlusion distance value and record it as the farthest distance value , extract the end occlusion distance value of the time variation curve and record it as the end value , the terminal value The farthest threshold from the preset Make comparisons;

[0062] S2: When When the user is too far away, it can be judged that the user has left the workstation, a leave status signal is generated. When , go to step S3;

[0063] S3: Assume that the end time value of the change curve is , preset an intercept duration T, calculate the time range ( ) and recorded as the judgment distance value , get the time range ( ) The maximum and minimum values ​​of the occlusion distance are recorded as and , respectively calculate and Distance value The difference is taken and the absolute value is taken, and the obtained value is compared with the preset fluctuation threshold. When any one of the two values ​​is greater than the fluctuation threshold, step S1 is performed; when both values ​​are less than or equal to the fluctuation threshold (the user is judged to be in a relatively stable posture state), step S4 is performed;

[0064] S4: Calculate the maximum distance value Distance value The difference is recorded as the near distance judgment value , with a preset close distance threshold ,Will and For comparison, Less than When the sitting state signal is generated, Greater than or equal to When , a stance state signal is generated.

[0065] It should be noted that by comparing and , can analyze the user's activity status, when Less than When the user is judged as sitting forward and backward pitching, Greater than or equal to , the user is judged as standing up after retreating a certain distance, and Depends on the maximum horizontal distance change value when the user normally changes the pitch angle (the maximum range of the occlusion distance value change caused by normal pitch adjustment is smaller than the occlusion distance value change caused by switching from sitting to standing. In a specific implementation, The value is 15CM).

[0066] It should be noted that the leaving status signal and the standing status signal both belong to other status signals.

[0067] Through comparison and analysis, the user's posture can be judged more accurately, thus making up for the sitting state that the laser monitoring unit cannot monitor, and the user's other state signals can be further classified and determined, making the judgment range of user behavior wider.

[0068] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An electric lifting table control system, comprising a table top (1), lifting table legs (2), supporting table legs (3) and a control panel, wherein the table top (1) and the supporting table legs (3) are connected via the lifting table legs (2), and characterized in that: It also includes a height binding module, a sitting posture monitoring module, a standing posture monitoring module, and a height adjustment module; The height binding module includes a high-definition camera for obtaining a high-definition image of the use side of the table top (1), and binding a standing posture data set and a sitting posture data set for each user, wherein the data set includes the height of the table top (1) in the corresponding posture of the user and the face data in the corresponding high-definition image; A sitting posture monitoring module includes a laser monitoring unit and a sitting time monitoring unit. The laser monitoring unit is used to monitor whether there is an object blocking the table. Two user status signals are preset, namely, a sitting posture status signal and another status signal. The sitting posture status signal and the other status signal are generated according to the blocking signal. The sitting time monitoring unit records the duration of the sitting posture status signal, obtains user health information to calculate the sitting posture restriction time, compares the duration of the sitting posture status signal with the sitting posture restriction time, generates a sitting posture too long signal and raises the table board (1) to switch to a standing posture status signal. The standing posture monitoring module comprises a radar monitoring unit and a standing time monitoring unit. The radar monitoring unit is used to generate a standing posture state signal. The standing time monitoring unit is used to record the standing posture time and calculate the standing time threshold. When the standing posture time is greater than or equal to the standing time threshold, a standing posture too long signal is generated to control the table board (1) to descend and switch to a standing posture state signal. The radar monitoring unit comprises a radar rangefinder (6) arranged on the use side of the table top (1), and obtains an obstruction distance value through the radar rangefinder (6). When the laser monitoring unit generates other state signals, the obstruction distance value is compared with a preset obstruction threshold value. When the obstruction distance value is less than the obstruction threshold value, it is marked as a suspected standing state. The duration of the suspected standing state is recorded and compared with a preset duration judgment threshold value. When the duration is greater than or equal to the duration judgment threshold value, a standing state signal is generated until the obstruction distance value is greater than or equal to the obstruction threshold value or a sitting state signal is generated; The dynamic analysis unit is also included. When the user status signal generated by the laser monitoring unit switches from the sitting state signal to other state signals, the dynamic analysis unit further analyzes and determines the user status signal. The specific analysis and determination process is as follows: S1: Within the preset time range, continuously obtain the occlusion distance value and draw a curve of the occlusion distance value changing over time, extract the maximum occlusion distance value and record it as the farthest distance value , extract the end occlusion distance value of the time variation curve and record it as the end value , the terminal value The farthest threshold from the preset Make comparisons; S2: When When the leaving state signal is generated, When , go to step S3; S3: Assume that the end time value of the change curve is , preset an intercept duration T and calculate the time range The average of the occlusion distance values ​​within is recorded as the judgment distance value , get the time range The maximum and minimum values ​​of the inner occlusion distance are recorded as and , respectively calculated and Distance value The difference is taken and the absolute value is taken, and the obtained value is compared with the preset fluctuation threshold. When any one of the two values ​​is greater than the fluctuation threshold, step S1 is performed; when both values ​​are less than or equal to the fluctuation threshold, step S4 is performed; S4; calculate the farthest distance value Distance value The difference is recorded as the near distance judgment value , , with a preset close-distance threshold ,Will and For comparison, Less than When the sitting state signal is generated, Greater than or equal to When , a standing state signal is generated; The height adjustment module obtains a sitting state signal or a standing state signal, extracts current face data according to different signals, and compares them with the face data in each standing data set and sitting data set, and adjusts the height of the table top (1) according to the comparison result and the obtained state signal.

2. The electric lifting table control system according to claim 1, characterized in that: The laser monitoring unit comprises three groups of laser transceiver components located below the table, the laser transceiver components comprising a laser transmitter (4) and a laser receiver (5) arranged opposite to each other, the three groups of laser transceiver components are all located on the same vertical plane, two groups of laser transceiver components are arranged crosswise, and the other group of laser transceiver components is arranged horizontally; When the three groups of laser transceiver components all generate occlusion signals, the user state is judged as sitting and a sitting state signal is generated. When the three groups of laser transceiver components all generate unobstructed signals, other state signals are generated. When the generated user state signal is different from the current user state signal, the user state signal is switched.

3. The electric lifting table control system according to claim 2, characterized in that: The three laser transmitters (4) are respectively a first laser transmitter, a second laser transmitter and a third laser transmitter, and the corresponding three laser receivers are respectively a first laser receiver, a second laser receiver and a third laser receiver. The first laser transmitter and the second laser transmitter are arranged on both sides below the table top (1), and the first laser receiver and the second laser receiver are arranged on the supporting table legs (3). The first laser transmitter is located below the second laser receiver, and the second laser transmitter is located below the first laser receiver. The lasers emitted by the first laser transmitter and the second laser transmitter are in an X shape. The third laser transmitter and the third laser receiver are respectively arranged on both sides of the supporting table legs (3) and are located on the same horizontal line.

4. The electric lifting table control system according to claim 1, characterized in that: The sitting time monitoring unit acquires a sitting state signal, records the duration of the sitting state signal as the sitting time, and presets a sitting time threshold value, which is directly input by the user or indirectly calculated based on the user's health information. When the sitting time is greater than or equal to the sitting time threshold value, a sitting too long signal is generated, and the sitting state signal is cleared at the same time, and the buzzer is controlled to sound an alarm. After a certain interval, the table board (1) is controlled to rise, and a standing state signal is generated.

5. The electric lifting table control system according to claim 4, characterized in that: The process of obtaining the sitting time threshold is as follows: When the user directly inputs a time value, the time value is used as the sitting time threshold; When the user does not enter a time value, obtain the health information data entered by the user. The health information data includes age, lumbar status, cervical status and BMI index. Get the age value , BMI index value , Lumbar spine status value and cervical spine status , substitute into the formula Calculate the sitting time threshold ,in All are preset factors; When the user does not input a time value and does not input health information data, the sitting time threshold is adjusted to a preset value.

6. The electric lifting table control system according to claim 1, characterized in that: The standing monitoring unit acquires a standing posture status signal, records the duration of the standing posture status signal as the standing posture duration, acquires a sitting posture threshold and multiplies it by a preset proportionality coefficient to obtain a standing posture threshold. When the standing posture duration is greater than or equal to the standing posture threshold, a standing posture too long signal is generated, and the standing posture status signal is cleared at the same time, and a buzzer is controlled to sound an alarm. After a certain interval, the table top (1) is controlled to descend, and a standing posture status signal is generated.

7. The electric lifting table control system according to claim 6, characterized in that: The height adjustment module adjusts the height of the table top (1) as follows: When a sitting posture state signal is obtained, a high-definition image of the user side at the current height is collected and facial data in the high-definition image is extracted and recorded as user data. The user data is compared with the facial data in each sitting posture data set. When there is facial data matching the facial data in a certain sitting posture data set, the height of the table board (1) is adjusted to the corresponding table board (1) height value. Otherwise, the height of the table board (1) is adjusted to the preset sitting posture height value. When a standing posture state signal is obtained, a high-definition image of the user side at the current height is collected and facial data in the high-definition image is extracted and recorded as user data. The user data is compared with the facial data in each standing posture data set. When there is facial data matching the standing posture data set, the height of the table top (1) is adjusted to the corresponding table top (1) height value. Otherwise, the height of the table top (1) is adjusted to the preset standing posture height value.

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